Desk-fall support.



'K THULANDER & v. 8. NELSON.

DESK FA'LL SUPPORT. APPLICATION FILED FEB. a. 1913.

1,205,411 1 Patented Nov. 21, 1916.

FlCl.

Z/Jiinesscs: Mentors ffonstantine flab/flay WW i I'cZorZi/Vcson.

M aw FIG] 9.:

UNITED STATES PATENT ornioui.

KONSTANTINE 'II-IULANDER AND VICTOR B. NELSON, OF ROCKFORD, ILLINOIS, ASSIGN- ORS TO NATIONAL LOCK COMPANY, OF ROCKFORD, ILLINOIS, A CORPORATION OF ILLINOIS.

DESK-FALL SUPPORT.

Specification of Letters Patent.

To all whom it may concern:

Be it known that we, KONSTANTINE THU- LANDER, a subject of the King of Sweden, and VICTOR B. NELSON, a citizen of the United States, residing at Rockford, in the county of Winnebago and State of Illinois, have invented certain new and useful Improvements in Desk-Fall Supports, of which the following is a specification.

Our invention relates to supports for desk falls, and may be used in all cases where it is desired to apply supporting means to the outer edge of a hinged element.

The object of our invention is to provide a desk fall support which will open to a desired position in either direction, and hence may be used either as a right-hand or lefthand support. Such supports have heretofore been made with a stop operating in but one direction, thus necessitating the manufacture and use of a different support for each end of the desk fall. The interchangeability of our support is a valuable feature, as it obviates the necessity of carrying diflerent kinds of supports in stock, avoids mistakes in filling orders for repairs, and facilitates the assembling of the desk parts.

In the accompanying drawings, Figure 1 is a perspective view of a desk fitted with our improved device. Fig. 2 is a fragmental side elevation of our device when opened as a right-hand support. Fig. 3 is a section on the line 3 3 of Fig. 2. Fig. 4: is a representation of the same device partially folded and being changed from a right-hand to a lefthand support. Fig. 5 shows the same device opened as an inverted left-hand upport, the turning movement indicated in Fig. 4 having been completed. Fig. 6 is a perspective view of the stop plate of the device. Fig. 7 is a fragmental perspective view on a reduced scale showing the method of attaching the support to the desk fall leaf.

In the embodiment of our invention here illustrated, the desk-7 has ends 8 and 9 and a hinged fall leaf 10 supported at either end by our improved interchangeable supports,

' which supports comprise an upper arm 11,

a lower arm 12 pivotally connected with the arm 11, and a stop plate 13. The upper arm 11 is perforated for pivotal attachment to the desk end 8 or 9; and the lower arm may be pivotally connected in any suitable manner with the fall leaf 10. In the embodiment herein shown this attachment is effected by means of a small bracket plate 14 pivotally connected with the arm 12 by means of a bolt or rivet 14;, and perforated for rigid attachment to the fall leaf 12. In order to clear the end of the desk the upper arm 11 is slightly offset at 15 just below the point of attachment to the desk.

In the prior art the stop which prevents the unfolding support from reaching or passing dead center has been formed on one of the arms near the point of intersection. Inasmuch as the ofiset at 15 is necessary and the bracket plate 1 1 must be on the inner side of the arm 12, it is obvious that a support opening in but one direction could be used on but one end of the desk, thus necessitating the manufacture of a right-hand and left-hand support, as above stated. We have overcome this necessity by forming the stops in such a manner that the arms may open in either direction to the same predetermined extent, short of a dead center. This may be accomplished in various ways. In the specific embodiment of our invention herein shown, we have formed the stop on the stop plate 13 which is placed between the ends of the arms 11 and 12, perforated and loosely centered on a rivet 16 by which also the said ends are pivotally connected. The stop plate 13 is formed with three lugs or stops 17, 18 and 19, two of which, 17 and 18, are adapted to engage the upper arm 11 while the lug 19 is formed in a reverse direction to engage the lower arm 12.

When in use as a right-hand support the position of the parts is shown in Fig.2, and as adapted to the right-hand end of the desk, in Fig. l. The descending fall leaf 10 opens the arms 11 and 12, turning on the pivot 16 until the stop 18 coming in contact with the arm 11 and the stop 19 engaging the arm 12, the limit of the opening movement is reached before the arms have reached a dead center position, thus making it possible to fold the Patented Nov. 21, 1916.

that which it engaged in Fig. 2, the stop 18 now being idle. The action of the stop 17 and 19 limits the opening movement of the arms. The relative position of the arms be ing reversed, the ofl set at l5 and the bracket plate l t are oppositely faced, and the support is adapted to be attached to the lefthand end 8 of the desk 7, as shown in Fig. l.

The stop plate 13 is made two-thirds round, so that in either open position one of its straight edges lies parallel with one edgeof the arm 12, thus adding to the neat appearance of the device.

It is obvious that details of construction may be varied without departing from the spirit of our invention.

Having thus described our invention, we claim:

1. A reversible desk-fall support comprising two pivotally connected arms, a stop plate rotatably mounted between said arms and adapted to limit the opening movement of said arms in either direction, and a lug pivoted at the end of one of said arms and adapted to form a reversible connection with the desk-fall.

2. A desk fall support comprising pivotally connected arms and a rotatable stop plate adapted to prevent said arms from opening in either direction to a dead center.

3. In a desk fall support, two pivotally connected arms and a stop plate rotatably V mounted between said arms and having two oppositely positioned stops adapted to engage either side of one of said arms, and a single stop adapted alternately to engage either side of the other arm.

In testimony whereof we affiX our signatures in the presence of two witnesses.

KONSTANTINE THULANDER; VICTOR B. NELSON.

Witnesses:

A. P. HARD, E. C. TRANER.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. G. 

